2023 dec 15th

Python/2023/15/main.py

@@ -0,0 +1,41 @@
+
+input = open("input", 'r').read().rstrip()
+
+data = input.split(",")
+
+total = []
+
+def hash(cv, inp):
+    for char in inp:
+        cv += ord(char)
+        cv *= 17
+        cv %= 256
+    return cv
+
+for inp in data:
+    total.append(hash(0, inp))
+
+print(sum(total))
+
+boxes = [{} for _ in range(256)]
+
+for inp in data:
+    if inp[-1] == "-":
+        label = inp[:-1]
+        box = hash(0, label)
+        if label in boxes[box]:
+            del boxes[box][label]
+    else:
+        label, fl = inp.split("=")
+        box = hash(0, label)
+        boxes[box][label] = int(fl)
+
+print(boxes)
+
+total2 = []
+
+for i, box in enumerate(boxes):
+    for slot, fl in enumerate(box.values()):
+        total2.append((i+1)*(slot+1)*fl)
+
+print(sum(total2))